The absolute magnitude of the AM stars

Details The absolute magnitude of the AM stars The absolute magnitude of the AM stars

Jan 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981a%26a....93..155g&link_type=abstract

Astronomy and Astrophysics, vol. 93, no. 1-2, Jan. 1981, p. 155-159.

Astronomy and Astrophysics

Astrophysics

22

A Stars, Astrometry, Statistical Analysis, Stellar Magnitude, Binary Stars, Calibrating, Maximum Likelihood Estimates, Star Clusters, Stellar Luminosity, Stellar Parallax

Scientific paper

The absolute magnitude of the Am stars has been determined by a statistical parallax method based on the principle of maximum likelihood applied to a sample of 165 stars. The calibration of the absolute magnitude has been carried out in terms of different photometric indices from the UBV, usby and seven-color (Geneva) systems. The results have been compared to the values obtained from Am stars in visual binary systems and in clusters. We showed that barMυ = 1m.2±0m.3 and that consequently the Am stars lie one magnitude above the main sequence, the exact amount depending upon the definition of the MS used.

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